Summary:ASTERISK-06097: PRI calls to just ONE number dropped with NOANSWER between pstn and Alcatel
Reporter:mimmo (mimmo)Labels:
Date Opened:2006-01-16 11:10:41.000-0600Date Closed:2011-06-07 14:10:17
Versions:Frequency of
Environment:Attachments:( 0) session-failing.log
( 1) session-ok.log
( 2) session-voip-ok.log
( 3) zapata.conf
( 4) zaptel.conf
Description:I have this setup:
 E1 PRI PSTN --- Asterisk --- Crossover E1 cable --- Alcatel PBX
Many analog phones are connected to the Alcatel PBX, a few of VoIP phones are directly attached to Asterisk.
A call to just ONE PSTN number (+39)0984465691 (an automatic responder) initiating from an analog phone is always dropped with NOANSWER.
No problems with other PSTN numbers, with VoIP phones and if I start call by a .call file!


Asterisk 1.2.1.
Comments:By: Philip Walls (malverian) 2006-01-16 12:33:01.000-0600

This has happened to us as well (T1 PRI) with specific numbers. It seems to only happen if I reload chan_zap.so too many times while the server is running (eg, to mess with line gains or echo cancellation options).

The symptom is that the number will ring about 5 times and then go to NOANSWER. We tested the same number with other analog lines as well as from mobile phones and it worked fine. Mog from Digium tried to help me diagnose this problem, but no solution was reached.

I recommend stopping Asterisk, unloading all of your zaptel modules and then starting everything back up. It has worked here in the past, and I'd be interested to know if this solves your problem as well.

By: mimmo (mimmo) 2006-01-17 00:32:56.000-0600

No, this number doesn't work even if I restart everything.
If I call from a directly attached VoIP phone, OK.
If I call from an analog phone on the PBX downstream, NOT OK.
Only workaround: announce problem and hangup user and call back him/her by a .call file.

By: reformed (reformed) 2006-01-17 06:02:41.000-0600

In session-failing.log you're calling a 10 digit phone number 0984465691
And in session-ok.log you're calling a 9 digit phone number 098435715

COuld it be the problem?

By: mimmo (mimmo) 2006-01-17 06:15:53.000-0600

No. In Italy numbers can have a different number of digits

By: Matthew Fredrickson (mattf) 2006-01-17 09:38:48.000-0600

Post a pri debug of calls to the SAME failing number, one with the analog phone (unsuccessful) and one with the IP phone that works (the successful one).

By: mimmo (mimmo) 2006-01-18 00:43:55.000-0600

Uploaded pri debug from a working IP phone (session-voip-ok.log).
Call from not working analog phone to same number already uploaded (session-failing.log)

By: Matthew Fredrickson (mattf) 2006-01-20 17:09:34.000-0600

Going through Digium support.